Listen to Robert Emmerich introduce The Big Apple, a hit song from 1937. Music written by Bob and performed by Tommy Dorsey's Clambake Seven with Bob on piano. Lyrics written by Buddy Bernier and sung by Edythe Wright. Audio provided by Dorothy Emmerich.

Five o’clock is when many people get out of work and when many bars open. “It’s five o’clock somewhere” is a drinking expression—an old excuse that it’s always time for a drink. “It’s Five O’Clock Somewhere” was a 2003 hit song for Alan Jackson.

Wikipedia: It’s Five O’Clock Somewhere“It’s Five O’Clock Somewhere” is a song sung by Alan Jackson with Jimmy Buffett, and written by Jim “Moose” Brown and Don Rollins. The title refers to a popular expression used to justify drinking at any time of day, given that somewhere in the world it’s 5pm (an acceptable time to start drinking). The song was released by EMI April Music Inc., R. Joseph Publishing, Sea Gayle Music, and Warner-Tamerlane Publishing Corp. in Arista Nashville in 2003. The song spent eight non-consecutive weeks at Number One on the Billboard Hot Country Songs chart in summer of 2003. In addition, the song hit number 17 on the US Hot 100, making it the biggest pop hit for either performer. On November 5, 2003, it also won the Country Music Association (CMA) Award for Vocal Event of the Year. It is also Buffett’s only Number One hit.

Google BooksBilly Graham, and seven who were saved
By Lewis W. Gillenson
New York, NY: Trident Press
1967
Pg. 129:
He told himself it was always five o’clock somewhere in the world (London, Rome, Istanbul) so if he wanted a drink at noon his time he always managed to find a part of the world where it was five o’clock.

Google BooksListening to America:
A traveler rediscovers his country
By Bill D. Moyers
New York, NY: Harper’s Magazine Press
1971
Pg. 142:
“The doctor said he could have bourbon at five o’clock every day. I let him have a little three times a day. I look at my watch at three different times and figure it’s five o’clock somewhere in the world.”

Google BooksMcBee’s Station
By Elise Sanguinetti
New York, NY: Holt, Rinehart and Winston
1971
Pg. 128:
“Well, well, well,” she said cheerily, “already time for the cocktail hour, is it? What is it the old judge used to say: ‘It must be five o’clock somewhere in the world.’”

23 October 1974, El Paso (TX) Herald-Post, “The Bottle’s Mouth” by Norton Mockridge, pg. E3, cols. 1-2:
Robert Benchley authored a piece in the book (The Booze Book—The Joy of Drink, edited by Ralph Schoenstein—ed.), and that reminded Mr. Schoenstein of his favorite cocktail-hour story. Seems that Harry Truman went to the bar in a certain club early one afternoon and asked for a bourbon and water.

“I’m sorry,” said the head of the club, “but the bar doesn’t open till five o’clock.”

Google BooksWitness to Power
By Marquis William Childs
New York, NY: McGraw-Hill
1975
Pg. 45:
In fact, it dampened any exchange until, finally, the President said in a slightly more cheery vein, “Well, it must be five o’clock somewhere; let’s have a drink.”

Google BooksLet’s Go Britain & Ireland 1998
By Let’s Go, Inc.
New York, NY: St. Martin’s Press
1998
Pg. 116:
For an early pint, try one of the pubs around Smithfield, a meat and poultry wholesale market in business since the 12th century; some surrounding pubs open at 7am. What the hell, it’s 5 o’clock somewhere.

OCLC WorldCat recordIt’s 5 o’clock somewhere : the global guide to fabulous cocktails
Author: Colleen Mullaney
Publisher: New York : Sixth & Spring Books, 2008.
Edition/Format: Book : English : 1st ed
Summary: A collection of 60 cocktails from around the world, including the biggest hotels and the smallest corners of the globe. Includes: recipes and secrets to becoming a master mixologist; each destination’s quintessential cocktail; bar snack suggestions; fun facts about the drink’s destination or origin; a cocktail music playlist.